System of electrical distribution.



H, W. CHENEY.

SYSTEM OF ELECTRICAL DISTRIBUTION.

APPLIQATION FILED OCT. 6, 1909.

1,005,937. Patented 0@t.'17,1911.

LE 1 m "3 UNITED sTA ns PATENT QFFICG I HERBERT W. CHENEY, F MILWAUKEE, WISCONSIN, ASSIGNOR TQ ALLIS-GHALME BS COMPANY, A GORPORATION OF NEW JERSEY.

SYSTEM OF ELECTRICAL DISTRIBUTION.

moses"! Specification of Letters Patent.

Patented ea, 1?, rear.

Application filed October 6, 1909. Serial No. 521,368.

Tooll whom "it may concern:

Be it known that I, I-lnnnnnr lV. CHEN-Ev,

a citizen of'the United States, residing at Milwaukee, in the county-of Milwaukee and Stateof il isconsin, have invented certain new and useful Improvements in Systems of ElectricalDistribution, of which the following is a full,'clear, and exact specification.

M controlledby the series overload coils,

lhis invention relates to systems of current distribution and particularly to means for operating a plurality of circuit brealrers in the conductors of the system.

The object of the invention is the provision of means whereby a number of circuitbreakers in the conductors of a distributing system may he closed independently, and tripped simultaneously pn "the occurrence of predetermined line cdnditions, such as an' overload in any conductofo'f the system and on the occurrence of no voltage or a predeterm ned drop in the voltage between two conductors of the system In carryingout my invention I provide a system ofdistribution consisting of two or more conductors having circuit breakers which are retained in closed position by normolly energized coils in a tripping circuit preferably connected across two of the conductors oi the system,- the trippiug circuit being designed to. be opened so as to eliect the simultaneous release or opening of all the circuit breakers by the operation of any one of a number of switches each controlled by a series overload coil in one of the'con ductors of the system or by the partial "or inoperative without affecting the operation.

of the other conductors and circuit breakers, and this I accomplish by means of a plugized tripping coils 23, r?

rality of auxiliary switches each connected in shunt to one of the overload switches in the tripping circuit, so that when one oftheauxiliary switches is closed one of the main.

circuit breakers may be open without affecteing'the tripping circui My invention :may be further briefly sum marize'd as consistinginlcertain novel arrange nents and combinations of parts which will be described in the specification and set forth in the appended 012111115. Lvv Referring to the accompanyingfigure ofv the drawing, which shows diagrammatically a system of distribution equipped with the features of my invention, it will be seen that I have shown asysem of distribution consisting,'in this case, of three conductors 10, 11 and 12 which may be conductors of three phase or'of a multiple conductor di. rect current system. The conductors are provided respectively with automatic cir-v cuit breakers 13, 14 and 15 which may be of any suitable construction but are hereshown somewhat conventionally as having a pair of stationary contacts 16 adapted to be bridged by a movable contact 17 open atively' connected to a handle'lS and de,

signed to opened by a coil spring 19. The circu t breakers are adapted to he l reld in, closed pOSllllOl'lTQSpiCliVP f means of pivoted spring actuated-latche 20, 21 and 22 i which are held in certain positions and are restrained against movement to trip the ci'r-- cuit breakers by means of normally enerind in trip ping circuit, w iich may be designated as whole'by the reference character Q6, and which, in this case, is supplied with current by conductors l0 and ll, being connected across and to these conductors at 27 and 28.

in order that all the circuit breakers may be simultaneously tripped on the occurrence of an. overload in any one oi? the main conductors 10, 11 and 12, the, latter are provided respectively with series overload coils-a 29, 3G and ii'l'adaptedto open respectively, on overload, normally closed overload switches 32, and l in the tripping circuit 26. In order that the tripping circuitmay be caused to remain open long as one or more of the circuit breakers are open I ro-" vide adjacent each circuit breaker anc in the tripping circuit a circuit opening switch, these three switches being designated respectively 35, 36 and37, and each being designed to be opened when the corresponding circuit breaker is opened and to be closed when the circuit breaker is closed.

Thus it will be seen from the arrangement so far described that on the occurrence of an overload in any one of the main conductors, the tripping circuit will be opened by one or more of the overload switches 32, 33 and 341- and all the circuit breakers will be simultaneously opened, and on the failure of current in the tripping circuit or on the occurrence of 'a predetermined drop in the voltage between the conductors 10 and 11,

the tripping coils 23, 24 and 25 will be partially or wholly dencrgized causing the circuit breakers to be simultaneously opened.

In order that the circuit breakers may be closed independently I provide a normally open hand switch 39 the terminals of which are connected to the tripping circuit in shunt to the overload switches 32, 33 and 34 and to the auxiliary switches 35, 36 and 37, the connections of the switch 39 to the tripping circuit being at the points 27 and 40. It will be seen that if the switch 39 is closed the overload switches and the aux- 'iliary switches adjacent the circuit breakers are rendered inefi'ective for opening the tripping circuit and consequently as soon as this switch is closed the tripping COIlS are energized regardless of the positions of the circuit breakers, which can, therefore, be closed independently. When the switch 39 is open, the tripping circuit will be opened when any one of the overload switches is opened.

To render any one of the main conductors and the corresponding circuit breaker inoperativ'e .so that one or more of the circuit breakers may be left in open position while the others are closed, I provide small normally open hand switches 41, 42 and 43 each connected to the tripping circuit in shunt to the overload switch 32, 33 or 34 and to the auxiliary circuit openino' switch 35, 36 or 37 of each circuit breaker, each of these normally open switches ell, 42 and 43 being connected to the tripping circuit at points designated 44 and 45. Thus when any one of these switches 41, 42 or 43 is closed the corresponding overload switch and the corresponding small auxiliary circuit opening switch 35, 36 or 37 operated by any one of the circuit breakers is rendered ineffective for opening the tripping circuit and eonscqucntly the corresponding circuit breaker may be left in open position without interfering with the operation of the remaining conductors and corresponding circuit breakers.

v I do not desire to be confined to the exact combinations and arrangements shown, but aim in my claims to cover all modifications which do not iuroc a departure from the spirit and scope oi my invention.

lVhat I claim as new and desire to secure by Letters Patent is 1. In combination, in a system of dis tribution, a plurality of electric conductors each provided with a circuit breaker, a tripping circuit having a number of normally energized coils each serving to hold one of the circuit breakers in closed position, a plurality of overload switches in the tripping circuit, and a normally open switch having terminals connected to the tripping circuit in shunt to each of said overload switches.

2. In combination, in a system of distri each provided with a circuit breaker, a tripping circuit having a number of normally energized coils each serving to hold one of the circuitbreakers in closed position, a plurality of overload switches in the tripin one of the main copductors, a normally open switch having terminals connected to the tripping circuit in shunt to each of said overload switches, and a normally open switch having terminals connected to the tripping circuit in shunt to all of said overload switches.

3. In a system of distribution, a plurality of electric conductors each provided with a circuit breaker, a tripping circuit having a plurality of normally energized coils each serving to maintain one of said circuit breakers in closed position, a plurality of overload switches in said tripping circuit and each having an overload operating coil in one of the conductors of the system, and a. plurality of additional switches in the tripping circuit one for each circuit breaker and adapted to be opened when the circuit breaker is opened and tobe closed when the circuit breaker is closed.

4. In combination, in a system of distribution, a plurality of electric conductors, each provided with a circuit breaker, a tripping circuit having a plurality of normally energized coils each serving to maintain one of the circuit breakers in closed position, a plurality of overload switches in the tripping circuit: each having an overload operating coil in one of the conductors of the system. a plurality of additional switches in opened when one of the circuit breakers is opened and adapted to be closed when the circuit breaker is closed. and a normally open switch luiring terminals connected to the tripping circuit in shunt to one of said last named switches and to one of the overload switches.

5. in combination, in a system of distribution, a plurality of electric conductors, eachprovided with a circuit breaker, a tripbution, a plurality of electric conductors,

ping circuit each having an overload coil the tripping circuit each adapted to be' ping circuit having a plurality of normally energized COllS each serving to maintain one of the circuit breakers in closed posinected in shunt to all the overload switches tion, a plurality of overload switches in the and to all said additional switches in the tripping circuit each having an overload trip'ping circuit. operating coil in one of the conductors of Milwaukee, Wis, Sept. 10, 1909.

5 the. system, a plurality of additional In testimony whereof I mfix my signw 15 switches in the tripping circuit each adaptture, in the presence of two Witnesses. ed to be opened when one of the circuit HERBERT CHENEY. breakers isiopened and adapted to be closed Witnesses:

' when the circuit breaker is closed, and a CHAS. L. BYRON,-

10 normally open switch having terminals con- Roe. E. STOLL. 

